Simon or William Martin, early Union resident

Simon or William Martin, early Union resident

I'm looking for any information on Simon Martin (b. 1760, Maryland, d. 1839) in Union County. Per family history collected in 1946 Simon Martin and family moved from Delaware and were early residents of the area that is now Union County. Simon's sons (Simon II and William) moved to Rush County after a decade or so, but Simon and his wife reportedly remained in Union County and are and buried there. There also is an alternate theory on the Internet that Simon I may have been "William". Information on either names would be helpful.